Silverstripe Forms allow malicious HTML or JavaScript to be inserted
through non-scalar FormField attributes, which allows performing XSS (Cross-Site Scripting)
on some forms built with user input (Request data). This can lead to phishing attempts
to obtain a user's credentials or other sensitive user input.
There is no known attack vector for extracting user-session information or credentials automatically,
it required a user to fall for the phishing attempt.
XSS can also be used to modify the presentation of content in malicious ways.